Elanor was a yellow flower that grew in Lórien, particularly upon the hill of Cerin Amroth. The blossoms were small and star-shaped. Lady Galadriel wore a crown of it and referred to it in her song when bidding the Fellowship of the Ring farewell.
Sam's daughter in The Return of the King is named after this flower; she is usually referred to as having an Elvish beauty rather than a Hobbit's.